[time-nuts] time-nuts Digest, Vol 31, Issue 14

Mike S mikes at flatsurface.com
Mon Feb 12 19:39:44 EST 2007

At 06:21 PM 2/4/2007, Phaysal Khan wrote...
>Thanks for the responce. you are right, some 
>where else i also found 7uS accuracy 
>requirements as well, but these values seem to 
>be a bit older. coz with HSDPA coming up, with 
>bitrate upto 10.8Mbps, bit duration comes out to 
>be 92.6 ns. this might need better 
>synchronization accuracy than 10 or 7uS. I 
>wonder if the accuracy limits have been modified 
>for meeting such data rates?!.
>What do u say abt this?

TIA/EIA 97 F (January 2005): " ... For 
all base stations the pilot time alignment error 
should be less than 3 µs and shall be less than 10 µs.... ... For all operating temperatures 
specified by the manufacturer, the average 
frequency difference between the actual CDMA 
transmit carrier frequency and specified CDMA 
transmit frequency assignment shall be less than 
±5^10-8 of the frequency assignment (±0.05 ppm)." 

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